What does Oedipus learn fron the shepherd in "Oedipus Rex"? "Oedipus Rex" by Sophocles

In Scene 3 of
's "," aarrives with the news that King Polybos is dead and the people of Isthmus
wantto be their king.  Oedipus's joyful reaction to the news of the king's death is evidenced as
he feels that it dispels the oracle's prophecy that he will kill his mother.  However, Oedipus
is still worried that he may marry his mother.

But, in Scene 4, Fate steps in
again and produces the shepherd being brought in by servants of the house of Oedipus.  As the
shepherd nears, the messenger from Corinth recognizes him:  "I know him, he was Laios's
man."

When the shepherd fails to...